<template>
  <div class="component-upload-image">
    <el-upload
      multiple
      :action="uploadImgUrl"
      list-type="picture-card"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      ref="imageUpload"
      :before-remove="handleDelete"
      :show-file-list="true"
      :headers="headers"
      :disabled="disabled"
      :data="paramsData"
      :file-list="fileList"
      :on-preview="handlePictureCardPreview"
      :class="{ hide: fileList.length >= limit }"
    >
      <Icon icon="ep:plus"/>
      <!-- <el-icon class="avatar-uploader-icon"> -->
<!--        <plus />-->
      <!-- </el-icon> -->
    </el-upload>
    <!-- 上传提示 -->
    <div class="el-upload__tip" v-if="showTip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>

    <el-dialog
      v-model="dialogVisible"
      title="预览"
      width="800px"
      :close-on-press-escape="false"
      :close-on-click-modal="false"
      append-to-body
      destroy-on-close
    >
      <img :src="dialogImageUrl" style="display: block; max-width: 100%; margin: 0 auto" />
    </el-dialog>
  </div>
</template>

<script setup lang="ts">

// import { listByIds, delOss } from '@/api/system/oss'
import { propTypes } from '@/utils/propTypes'

import { ComponentInternalInstance, PropType } from 'vue'
// import { OssVO } from '@/api/system/oss/types'
import { ElUpload, UploadFile } from 'element-plus'

const props = defineProps({
  modelValue: [String, Object, Array],
  // 图片数量限制
  limit: {
    type: Number,
    default: 5,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 5,
  },
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: {
    type: Array as PropType<string[]>,
    default: () => ['png', 'jpg', 'jpeg'],
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
  // 是否禁用
  disabled: {
    type: Boolean,
    default: false
  },
  tip: {
    type: Boolean,
    default: true
  },
  uploadUrl: {
    type: String,
    default: '/resource/oss/upload',
  },
   // 上传参数
  params: {
    type: Object,
    default: () => {}
  },
  // 图片上传类型： ossId || url
  uploadType: propTypes.string.def('ossId')
})
const paramsData = ref(props.params || {})
const { proxy } = getCurrentInstance() as ComponentInternalInstance
const emit = defineEmits(['update:modelValue', 'stringSuccess'])
const number = ref(0)
const uploadList = ref<any[]>([])
const dialogImageUrl = ref('')
const dialogVisible = ref(false)

const baseUrl = import.meta.env.VITE_APP_BASE_API
const uploadImgUrl = ref(baseUrl + props.uploadUrl) // 上传图片服务器地址
// const headers = ref({ Authorization: 'Bearer ' + getToken() })
const headers = ref()

const fileList = ref<any[]>([])
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
)

const imageUploadRef = ref(ElUpload)

watch(() => props.modelValue, async val => {
  if (val) {

  } else {
    fileList.value = []
    return []
  }
}, { deep: true, immediate: true })

/** 上传前loading加载 */
const handleBeforeUpload = (file: any) => {
  paramsData.value.requestId = generateUUID()
  let isImg = false
  if (props.fileType.length) {
    let fileExtension = ''
    if (file.name.lastIndexOf('.') > -1) {
      fileExtension = file.name.slice(file.name.lastIndexOf('.') + 1)
    }
    isImg = props.fileType.some((type) => {
      if (file.type.indexOf(type) > -1) return true
      if (fileExtension && fileExtension.indexOf(type) > -1) return true
      return false
    })
  } else {
    isImg = file.type.indexOf('image') > -1
  }
  if (!isImg) {
    proxy?.$modal.msgError(
      `文件格式不正确, 请上传${props.fileType.join('/')}图片格式文件!`
    )
    return false
  }
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize
    if (!isLt) {
      proxy?.$modal.msgError(`上传头像图片大小不能超过 ${props.fileSize} MB!`)
      return false
    }
  }
  proxy?.$modal.loading('正在上传图片，请稍候...')
  number.value++
}

// 文件个数超出
const handleExceed = () => {
  proxy?.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`)
}

// 上传成功回调
const handleUploadSuccess = (res: any, file: UploadFile) => {
  if (res.code === 200) {
    uploadList.value.push({ name: res.data.fileName, url: res.data.url, ossId: res.data.ossId })
    uploadedSuccessfully()
  } else {
    number.value--
    proxy?.$modal.closeLoading()
    proxy?.$modal.msgError(res.msg)
    imageUploadRef.value.handleRemove(file)
    uploadedSuccessfully()
  }
}

// 删除图片
const handleDelete = (file: UploadFile): boolean => {
  const findex = fileList.value.map(f => f.name).indexOf(file.name)
  if (findex > -1 && uploadList.value.length === number.value) {
    if (props.uploadType === 'ossId') {
      let ossId = fileList.value[findex].ossId
      // delOss([ossId])
    }
    fileList.value.splice(findex, 1)
    emit('update:modelValue', listToString(fileList.value))
    return false
  }
  return true
}

// 上传结束处理
const uploadedSuccessfully = () => {
  if (number.value > 0 && uploadList.value.length === number.value) {
    fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value)
    uploadList.value = []
    number.value = 0
    emit('update:modelValue', listToString(fileList.value))
    proxy?.$modal.closeLoading()
  }
}

// 上传失败
const handleUploadError = () => {
  proxy?.$modal.msgError('上传图片失败')
  proxy?.$modal.closeLoading()
}

// 预览
const handlePictureCardPreview = (file: any) => {
  dialogImageUrl.value = file.url
  dialogVisible.value = true
}

// 对象转成指定字符串分隔
const listToString = (list: any[], separator?: string) => {
  let strs = ''
  separator = separator || ','
  for (let i in list) {
    if (props.uploadType === 'ossId') {
      if (undefined !== list[i].ossId && list[i].url.indexOf('blob:') !== 0) {
        strs += list[i].ossId + separator
      }
    } else if (props.uploadType === 'url') {
        strs += list[i].url + separator
    }
  }
  return strs != '' ? strs.substring(0, strs.length - 1) : ''
}
</script>

<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
:deep(.hide .el-upload--picture-card) {
  display: none;
}
</style>
